LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2017 >> NX 200t Base, AWD >> Repair and Diagnosis >> Transmission >> Transfer Case >> Dynamic Torque Control AWD System - Diagnostics - Introduction >> Dynamic Torque Control AWD System >> Precaution [10/2014 - ] >> Precaution [10/2014 - ]
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Precaution [10/2014 - ]

  1. TROUBLESHOOTING PRECAUTION 
    NOTE:
    • Since the dynamic torque control AWD system may be influenced by a malfunction in other systems, be sure to check for DTCs in the other systems.
    • When removing and installing the 4WD ECU assembly and each sensor, be sure to check that the normal display is output in test mode inspection and in DTC output inspection after installing all the parts.
    • When the 4WD ECU assembly is replaced with a normal one from another vehicle, it is necessary to perform calibration.

      Refer to CALIBRATION [10/2014 - ] 

      HINT: 

      When replacing the 4WD ECU assembly with a new one, it is not necessary to perform calibration.

    • If a DTC of the CAN communication line is output, repair the malfunction in the communication line and troubleshoot the dynamic torque control AWD system.
    • Since the CAN communication line has its own length and route, it cannot be repaired temporarily with a bypass wire, etc.
  2. "4WD CONTROL PREVENTION MODE" OR "VSC/TR(A)C/4WD CONTROL PREVENTION MODE" PROCEDURES FOR INSPECTION AND MAINTENANCE 
    NOTE:

    In the case of using a speedometer tester, brake tester, or chassis dynamometer and so on, there is some possibility of a speed differential between the front and rear wheels. Therefore, before performing the test, make sure to enter "4WD Control Prevention Mode" or "VSC/TR(A)C/4WD Control Prevention Mode".

    1. Entering and Canceling "4WD Control Prevention Mode" or "VSC/TR(A)C/4WD Control Prevention Mode" (When Using Techstream)

      HINT: 

      • The operation of the dynamic torque control AWD system can be prohibited by entering "4WD Control Prevention Mode".
      • If "VSC/TR(A)C/4WD Control Prevention Mode" is selected, the operation of the vehicle stability control system and the dynamic torque control AWD system is prohibited.
      1. Entering "4WD Control Prevention Mode" or "VSC/TR(A)C/4WD Control Prevention Mode"
        WARNING:

        When using a drum tester while in "4WD Control Prevention Mode" or "VSC/TR(A)C/4WD Control Prevention Mode", secure the vehicle with a lock chain for safety.

        NOTE:
        • "4WD Control Prevention Mode" or "VSC/TR(A)C/4WD Control Prevention Mode" is canceled when the engine switch is turned off. Therefore, when continuing the inspection after the engine switch has been turned off during inspection, it is necessary to re-enter "4WD Control Prevention Mode" or "VSC/TR(A)C/4WD Control Prevention Mode".
        • Do not drive the vehicle while in "4WD Control Prevention Mode" or "VSC/TR(A)C/4WD Control Prevention Mode".
        1. With the engine switch off, connect the Techstream to the DLC3.
        2. Turn the engine switch on (IG), and enter the following menus: Four Wheel Drive / Utility / 4WD Control Prevention Mode or VSC/TR(A)C/4WD Control Prevention Mode.
        3. Following the display on the Techstream screen, enter "4WD Control Prevention Mode" or "VSC/TR(A)C/4WD Control Prevention Mode".

          HINT: 

          • When "4WD Control Prevention Mode" is entered:
            1. Check that the AWD test mode message is displayed on the multi-information display (AWD control prevention mode is operating).
          • When "VSC/TR(A)C/4WD Control Prevention Mode" is entered:
            1. Check that the AWD test mode message and TRAC OFF message are displayed on the multi-information display and that the VSC OFF indicator light is illuminated (for VSC, TRAC and AWD control prevention mode are entered).

        Chassis > Four Wheel Drive > Utility 

        Tester Display
        4WD Control Prevention Mode

        Chassis > Four Wheel Drive > Utility 

        Tester Display
        VSC/TR(A)C/4WD Control Prevention Mode
      2. Canceling "4WD Control Prevention Mode" or "VSC/TR(A)C/4WD Control Prevention Mode"
        1. Turn the engine switch off, wait for 60 seconds or more, and cancel "4WD Control Prevention Mode" or "VSC/TR(A)C/4WD Control Prevention Mode".
          NOTE:

          Make sure to turn the engine switch off after 60 seconds or more have elapsed since entering "4WD Control Prevention Mode" or "VSC/TR(A)C/4WD Control Prevention Mode". If the engine switch is turned off within 60 seconds, "4WD Control Prevention Mode" or "VSC/TR(A)C/4WD Control Prevention Mode" will continue when the engine switch is turned on (IG) again.

          HINT: 

          • When "4WD Control Prevention Mode" is entered:
            1. Check that the AWD test mode message is no longer displayed on the multi-information display (AWD control prevention mode is canceled).
          • When "VSC/TR(A)C/4WD Control Prevention Mode" is entered:
            1. Check that the AWD test mode message and TRAC OFF message are not displayed on the multi-information display and that the VSC OFF indicator light is not illuminated (VSC, TRAC and AWD control prevention mode are canceled).
    2. Entering and Canceling "VSC/TR(A)C/4WD Control Prevention Mode" (When Using Manual Operation)

      HINT: 

      When using manual operation, the operation of the vehicle stability control system and the dynamic torque control AWD system is prohibited.

      1. Entering "VSC/TR(A)C/4WD Control Prevention Mode"
        WARNING:

        When using a drum tester while in "VSC/TR(A)C/4WD Control Prevention Mode", secure the vehicle with a lock chain for safety.

        HINT: 

        • "VSC/TR(A)C/4WD Control Prevention Mode" is canceled when the engine switch is turned off. When continuing the inspection after the engine switch has been turned off during inspection, re-enter "VSC/TR(A)C/4WD Control Prevention Mode".
        • Do not drive the vehicle while in"VSC/TR(A)C/4WD Control Prevention Mode".
        • Perform input by parking and brake pedal within 30 seconds of turning the engine switch on (IG) (engine start).
        • If entering "VSC/TR(A)C/4WD Control Prevention Mode" cannot be confirmed, carry out the procedure again from step 1 after turning the engine switch off.
        • Fully depress or release the brake pedal when switching the brake pedal between ON and OFF so that the stop light switch changes between ON and OFF respectively.
        • Apply or release the parking brake when switching the parking brake between ON and OFF so that the parking brake light in the combination meter assembly comes on or goes off respectively.
        1. Ensure that the engine switch is off and the engine is stopped.
        2. Turn the engine switch on (IG).
        3. Release the parking brake.
        4. Turn the engine switch off.
        5. With the brake pedal depressed, start the engine.
        6. While holding the brake pedal down, apply the parking brake.
        7. With the parking brake applied, release and then depress the brake pedal 2 or more times consecutively, and then keep the brake pedal depressed.
        8. With the brake pedal depressed, release and then apply the parking brake 2 or more times consecutively, and then keep the parking brake applied.
        9. With the parking brake applied, release and then depress the brake pedal 2 or more times consecutively again.
        10. Check that the AWD test mode message and TRAC OFF message are displayed on the multi-information display and that the VSC OFF indicator light is illuminated (for VSC, TRAC and AWD control prevention mode are entered).
      2. Canceling "VSC/TR(A)C/4WD Control Prevention Mode"
        1. Turn the engine switch off, wait for 60 seconds or more, and cancel "VSC/TR(A)C/4WD Control Prevention Mode".
          NOTE:

          Make sure to turn the engine switch off after 60 seconds or more have elapsed since entering "VSC/TR(A)C/4WD Control Prevention Mode". If the engine switch is turned off within 60 seconds, "VSC/TR(A)C/4WD Control Prevention Mode" will continue when the engine switch is turned on (IG) again.

          HINT: 

          Check that the AWD test mode message and TRAC OFF message are not displayed on the multi-information display and that the VSC OFF indicator light is not illuminated (VSC, TRAC and AWD control prevention mode are canceled).

scientia non olet · About LEMON Manuals